Looper-operating mechanism for sewing-machines.



. v PATENTED DEC. 18, 1906. L. ONDERDONK. 1.00pm OPERATING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED MAY 21. 1901.

Quinn oc PATENTED DEC. 18, 1906. L. ONDERDONK. LOOPER OPERATING MECHANISM FORSEWI NG MACHINES.-

APPLIOATION FILED KAY 21, 1901.

3 SHEETS-SHEET 2.

, PATENTED DEC. 1 1906. -L. ONDERDONK. LOOPER OPERATING MECHANISM EOR SEWING MACHINES. 1901,

APPLICATION FILED MAY 21.

3 SHEETS-SHEET 3.

- UNI ED sTArns PATENT: orr on.

LANsiNe ONDERDONK, on NEW YORK, N. Y., ASSIGNOR TO' UNION SPECIAL sEWINe-MA HINE co, or CHICAGO, ILLINOIS, A CORPORATION or ILLINOIS.

LOOPER-OPERATING MECHANISM FOR SEWING-MACHINES.

Specification of Letters Patent.

Application filed May 21. 1901. Serial No. 61,270.

Patented Dec. 18 1906.

T (I/ZZ whom it may concern.-

Be it known that I, LANSING ONDERDONK, a citizen of the United States, residing at New York, in the county ofNew York, State of New York, have invented certain new and useful Improvements in Looper-Operating Mechanism for Sewing-Machines, of which the following is a description, reference being had to the accompanying drawings, and to the letters of referencemarked thereon.

My invention relates to an improvement in sewing-machines, and particularly to a looper operating mechanism therefor, the object being primarily to provide a looper mechani'sm'for post and post-cylinder ma chines of the type illustrated in my application for Letters Patent filed of even date I herewith, Serial No. 61,272.

The invention consists in the various matters hereinafter described, and referred to in the appended claims; v i

In the accompanying drawings, which illustrate the invention, Figure 1 is a plan view of one form of a sewing-machine embodying my invention. Fig. 2 is a side elevation, the bed-plate being in longitudinal vertical sec tion. Fig. 3 is a transverse vertical section on line 4 4 of Fig. 2, the cover of the vertical post being removed. Fig. 4 is a detail showing the eccentrics and the wrist pin, the lat tor for operatin the looper-lever. Fig. 4 is a face view of t 'e'larger eccentric. Fig. 5 1s adetail perspective illustrating the feed and looper operating devices, the space separatin the two mechanisms bein eXa gerated.

riefly, it comprises a hollow horizontal angular casing A, from the rear end of the member A...,of which rises the gooseneck, which is at right angles to the said case member A, and parallel with the forward case member A rises the hollow post N, from the upper end of which projects therearwardlyextending cylindrical bed-plate or horn A,

arallel with the case member, but in a liigher plane. The upper tension mechanism, the needle-bar N, its needle-clamp u and needle-lever N, presser-foot P, and pressenbar 1 are all ofthe usual construetion and need not be herein described.

O is the horizontal drive-shaft, provided with two cranksc c, to which are connected the rear ends of connectin -rods C 0, connected' at their opposite en s to cranks d d in the line shaft D. The left-hand end of the line or drive shaft D has. within its, post A two eccentrics (1 (P, the former carrying a wrist-pin (Z v F represents the feed-dOg-carrying'bar, the feed-dog being shown at F, herein illustrated as feeding the work off the end of the cylinder or in adirection away from the operator and pivotally connected at its end nearest the operator to the upper forked end f of main feed-lever F the lower end of said lever being strapped to the larger eccentric d on shaft D. The lever F ISfll-Itllfll' acted upon by the auxiliary lever F forked at its lower end f to straddle the smaller eccentric d of shaft D. This lever is ivoted at its upper end to the right side of ever F by a pivot-screwf and has a sliding adjustable pivot connection with the post A By this arrangement the four motions areimpartedto the feed-dog.

L is the looper-sha ft, mounted to slide and having a socket 1*, receiving the ball (1, carried by the eccentric d In order that the looper-shaft may have longitudinal or needle-avoiding movement in addition to the rocking or loop taking and loop leaving movement, I provide a transverse vertically-rocking tubular bearing L pivoted at Z to a bracket a on the inside of the post A and in this bearing slides the shank Z of the ball Z engaged by the socket l on the lever L just below socket Z It 'will be seen that as the lower ,end of the lever L is. carried around by the wrist-pin 1. its upper end will rock the looper-shaft and also looper-shaft. One-half of each of the sockets Z Z is formed in the removable capZf,

secured in place bythe screw 1 To vary the position .of the wrist-pin d, it is mounted on a ring (1, let in an annular recess d,

oscillate on the ball 1, and so reciprocate the a I claim as new, and desire formed in the face of the'eccentric d and g rovided with a series of slots or 0 enings through certain of which pass t e two attaching-screws d".

Having thus described my invention, what to secure by Letters Patent, is

l. A looper-operating mechanism for sew- 'ing-machines, comprising a horizontal shaft,

- work orcasing having a horizontal and a ver- I I member; substantially or framework, having a tical member, and a shaft journaled in thehorizontal member, suitable feeding mechanism, a looper-snpport with means for vibrating it backward and forward and sidewise, said means includin a loopenoperating lever connected at its lower end to said horizontal shaftand at its upper end freely connected to the looper-support and having also a ivotal conneatiemwith the vertical mem )er; substantially as described.-

3. Asewmg machine comprising a framcwork or casing having a horizontal and a verticalmcmber and a shaft journaled in the horizontal member, suitable feedin mechanism, a loo er-su port with means or vibrating it bac war .and forward and sidewise, sald means includin a looper-operating lever connected at its lower end to said horizontal'shaft and at its upper end freely connected tethe'looper-aupport and having also a sliding pivotal connection with the vertical as described.

4. A sewing-machine, comprising a casing or framework, having a horizontal and a vertical member, and a shaft journaled in the horizontal member, a feeding mechanism, a rocking and slidin looper-shaft at the upper end of the vertica member, and a looper-opcrating lever connected at its lower end to said shaft, and at its upper end pivotally-coi1- nected to the looper-supporting shaft, and having a pivotal and slidin connection be low the loo er-shaft with said vertical frame member;su stantially as described.

5. A sewing-machine, comprising a casing horizontal and a vertical member, and: a shaft journaled'in the horizontal member, and provided at the base of the vertical member with a wristin, a feeding mechanism, a rocking and sidin looper-shaft at the up or end of the vertica base member, and a ooper-operating lever,

transverse thereto,

otal connection at its outer end therefor including a vertically-amen connected at its lower end to the said wristpin, pivotally connected at its upper end to the said looper-shaft, and havin" a ivotal and sliding connection below tic ooper shaft, with said vertical frame member; substantially as described.

6. A looper-operating mechanism for sew-. ing-machines, comprising a 100 er-support, means for sliding and rocking t 1e same ineludin an operating-shaft, a vertically-arranged lever connecting the shaft with the looper-su port, said lever being pivotally connecterlwith the lo'oper-support, a rocking bearing fixed to the machine-frame, and a yielding pivot connection between the lever and the rocking bearing; substantially as described.

7. A looper-operating mechanism for sewingmachines, including a looper support and a lever having pivotal connection with the looper-support, a sliding pivot on which said lever swings, and a rockin bearing transverse to the feed in which t e sliding pivot is supported, said rocking bcarin bemg supported on a fixed art of the mac lineframe substantially as r escribed.

8. A looper-operating mechanism for sewing-machines, comprising a slidin and rock ing looper-support, an operatingever pivoted thereto at one end, a driving-shaft con nected with the opposite end of said lever, a

rocking bearing pivoted to a stationary part of the machine, a sliding pin sup orted in the rocking bearing-said sliding pin aving a pit with the operating-lever; substantially as described,

9. A looper-operating mechanism for sewing machines, comprising a longitudinally and laterally vibratin looper-support, an

operatingdever pivoter thereto, means for operating said lever, a block pivoted to a eta tlonary part of the machine, a pin or shaft slidin in said block, and pivoted to the oper* ating-* ever; substantially asdescribed.

a 10. In a sewingmachine, having a vertical post or casing member, a looper mechanism e o crating-lever, a transversely-arrange slidir fg and rocking support for the looper, a direct pivotal connection between the up er end of the looper-operatin lever, and t e loopersupport, a rocking iearing attached to thepost, a pin arrziged transversely of saidrocls' ing bearing a having slidin movement therein, and, i-votally connects at its outer end with the ooper-operating lever below its point of pivotal'connection with the loopersu port; substantially as described.

n testimony whereof I aflix my signature in presence of two Witnesses.

. LANSING ONDERDONK. Witnesses:

F. A. Noam, M. VAN WAGNER. 

